Tag: fern
-
Mazon Monday #308: Acitheca polymorpha
This is Mazon Monday post #308. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Acitheca polymorpha is an extinct species of the class Filcopsida. It is one of the rarer species of fern found in the Mazon Creek fossil localities. The classification of Acitheca polymorpha (Pecopteris polymorpha) has been problematic. Leo Lesquereux figured Pecopteris…
-
Fossil Friday #303: Mounted Pecopteris notata
This is the “Fossil Friday” post #303. Expect this to be a regular feature of the website. We will post fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Bluesky/Twitter hash tag for contributions from around the world! Today, we have one of the rarer forms, Pecopteris notata.…
-
ESCONI Field Trip to Danville Shale Pile Fossils – Saturday, September 27th, 2025
Danville Field Trip Rules for Saturday, September 27th, 2025 An ESCONI field trip to the Danville IL Shale Pile for Pennsylvanian fossils is scheduled for Saturday September 27, 2025 starting at 10 AM. This is on private property and there is an attendance limit of 25 people. The gate will be secured once we are…
-
Fossil Friday #275: Crenulopteris acadica
This is the “Fossil Friday” post #275. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! For this week, we have some very…
-
Fossil Friday #272: Crenulopteris acadica
This is the “Fossil Friday” post #272. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! —————————————————– Crenulopteris acadica is one of the…
-
Fossil Friday #271: Laveiniopteris rarinervis
This is the “Fossil Friday” post #271. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! —————————————————– This week we have a breathtaking…
-
Fossil Friday #269: Crenulopteris subcrenulata
This is the “Fossil Friday” post #269. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! —————————————————– This week, we have a stunning…
-
Mazon Monday #268: Pecopteris lanceolata
This is Mazon Monday post #268. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Pecopteris lanceolata is a very rare variety of true fern found only in the Mazon Creek fossil deposit. It was first described as Alethopteris lanceolata by Leo Lesquereux in 1870. Later in 1879, Lesquereux reclassified this fern as Pecopteris lanceolata.…
-
Mazon Monday #264: Crossotheca boulayi
This is Mazon Monday post #264. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Crossotheca boulayi is one of the rarer seed ferns in the Mazon Creek fossil biota. It was first described as Alethopteris hymenophylloides by Leo Lesquereux in 1870. The name was changed to Crossotheca boulayi by Charles Rene Zeiller (1847-1915). …
-
2025 ESCONI Gem, Mineral, and Fossil Show – Preview #25: Spiropteris from Mazon Creek
This is the preview post #25 for the 2025 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2025 will be held on March 15th and 16th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2025 ESCONI Gem, Mineral, and Fossil Show – Preview #21: Cyclopteris from Mazon Creek
This is the preview post #21 for the 2025 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2025 will be held on March 15th and 16th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
Mazon Monday #259: Pecopteris bucklandii
This is Mazon Monday post #259. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Pecopteris bucklandii is one of the rarer ferns from Mazon Creek. Like all the true ferns from Mazon Creek, P. bucklandii is an extinct species of the class Filcopsida. It’s fronds have been associated with the Caboniferous tree fern…
-
Fossil Friday #255: Pecopteris bucklandii
This is the “Fossil Friday” post #255. This is a regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the hash tag #FossilFriday on Twitter/X and Bluesky for contributions from around the world! —————————————————– We have a very rare Mazon…
-
Mazon Monday #258: Myriotheca scaberrima
This is Mazon Monday post #258. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Myriotheca scaberrima is a very rare fern, which was originally only known from fertile foliage. It was named by Leo Lesquereux as Sphenopteris scaberrima in 1870. In 1901, it was reclassified as Myriotheca scaberrima by Elias Howard Sellards (1875 –…
-
Fossil Friday #252: Oligocarpia gutbierii
This is the “Fossil Friday” post #252. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the hash tag #FossilFriday on Twitter/X and Bluesky for contributions from around the world! Oligocarpia gutbierii is a herbaceous…
-
2025 ESCONI Gem, Mineral, and Fossil Show – Preview #1: Crenulopteris acadica plate!
This is the preview post #1 for the 2025 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2025 will be held on March 15th and 16th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
Mazon Monday #249: Pecopteris oreopteridia
This is Mazon Monday post #249. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Pecopteris oreopteridia is a fern from the Carboniferous Period, which has been found in the Mazon Creek fossil deposits. It is fairly uncommon and resembles Crenulopteris acadica in appearance (see Mazon Monday #115). Besides the crenulated edge on mature…
-
Fossil Friday #240: Diplazites unita from Mazon Creek #fossils
This is the “Fossil Friday” post #240. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! We’ve got a nice Diplazites unita from…
-
Fossil Friday #236: Cyathocarpus arborea from the Mazon Creek River
This is the “Fossil Friday” post #236. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! We looked at Cyathocarpus arborea just a few…
-
Fossil Friday #233: Diplazites unita
This is the “Fossil Friday” post #233. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! Diplazites unita is one of the most…
-
Mazon Monday #236: Cyathocarpus arborea
This is Mazon Monday post #236. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Cyathocarpus arborea is one of the rarer species of fern in the Mazon Creek deposit. It was originally named as Filicites arborescens by Ernst Freiedrich, Freiherr von Schlotheim in 1820. Schlotheim was a German paleontologist and pollitician who lived…
-
Mazon Monday #231: Pecopteris strongii
This is Mazon Monday post #231. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Pecopteris strongii is a rare fossil fern known only from the Mazon Creek Fossil Flora. It was named for early Mazon Creek collector Samuel Strong by Leo Lesquereux in 1870. Strong was a prolific collector, who later sold most…
-
Fossil Friday #212: Mazon Creek Crenulopteris acadica
This is the “Fossil Friday” post #212. Expect this to be a somewhat regular feature of the website. We will post any fossil pictures you send in to esconi.info@gmail.com. Please include a short description or story. Check the #FossilFriday Twitter hash tag for contributions from around the world! —————————————————– This week’s contribution comes from a…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #21!
This is the preview post #21 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #20
This is the preview post #20 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #19!
This is the preview post #19 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #10!
This is the preview post #10 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #9!
This is the preview post #9 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
2024 ESCONI Gem, Mineral, and Fossil Show – Preview #6!
This is the preview post #6 for the 2024 ESCONI Gem, Mineral, and Fossil Show Live Auction. The ESCONI Gem, Mineral, and Fossil Show for 2024 will be held on March 16th and 17th at the DuPage Fairgrounds in Wheaton, IL, which is the same location as last year. All details can be found here.…
-
Fossil Friday #201: Crenulopteris acadica
This is Mazon Monday post #201. What’s your favorite Mazon Creek fossil? Tell us at email:esconi.info@gmail.com. Thanks! We have a nice Crenulopteris acadica (see Mazon Monday #115) for today’s Fossil Friday. Sometimes, they don’t come out of the freeze/thaw in one piece. Unfortunately, this one needed a little repair. It’s not as obvious from the fossil…
